I just reinstalled this game after a long time and I have to say it's one of those games that stays with you. Some games get boring 5 mins after restarting them, but not this one... I just love it
Wanted to share with you what I found out last time I played, and what you can do to gain unlimited exp (and money) at the very start of the game (well not that far into it, anyway).
1) Kill enemy by feeding on it
2) Use awaken on enemy
3) Back to 1
Doing this a few times on every fallen enemy in the beginning multiplies the exp you gain a few times over.
Save up the exp Christoph makes as a mortal and invest in feeding and wits (so that you dont have to try 10 times to feed on an enemy) and awake (so you dont fail that) as soon as he gets turned into a vampire, and you get a head start on this path. (you dont really need to use the exp to finish the silver mines, or prague by night).
Maxing these will result in you being able to do this more than 20 times per enemy... Add a few discipline items, and you can carry on doing this indefinately with the same enemy because you'll gain more blood feeding on it after awaking it than you lose by casting awake.
Doing this early on will let you gain exp indefinitely from any enemy as soon as on level 1 of the nosferatu sewers in prague (with a little luck getting the right items in the shops). You'll also get a lot of money this way since every killed enemy also has a chance of dropping loot. Investing a bit in manipulation (85+) to sell it for more money and buying expensive gear cheaper is the next logical step (and will net you those discipline items).
With a little (lot) patience, this'll actually let you play the game almost from the start with the best gear and maxed stats/diciplines... without formally cheating.
I hear you can also gain exp with raising fallen enemies with Shambling Hordes and then letting them die. Not sure if you can use this with feed though... The blood cost of Shambling Hordes is smaller than Awaken (10 in stead of 25), so it might actualy work, except you'll have to wait until you get Serena and train her in feed, wits and Shambling Hordes in stead. Would free up Christoph to maxing his manipulation I guess...
There are a few enemies (sub-bosses) that gives more exp than other mobs where you can get a LOT of exp by doing this, pretty fast. If I'm not mistaken, there is a nosferatu on the second level of the nos sewers that this'll work really well on (500 exp per pop?). Correct me if Im wrong here.
Then again, it totally breaks the game mechanics, and you might as well cheat instead of investing all that time into it.